Safety device for elevators.



W. JASKIBWIGZ.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED APR. 6, 1914. 1,1 21 ,729. Patented Dec. 22, 19m

3 HEETS-SHEET 1 F EV "f W. JASKIEWICZ.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED APR.6,1914.

1, 1 21 ,729. Patented Dec. 22, 1914.

3 SHEETSSHEET 2.

L J wvenioz HE NORRIb PEIFR ('0 PHOTO 1 rnm. WAQHINU 101V. 11 r W.JASKIEWIGZ.

SAFETY DEVICE FOR ELEVATORS.

APPLICATION FILED APR. 6, 1914.

1,121,729, Patented Dec. 22, 1914.

3 BHEETS-SHEET 3.

WILLIAM JASKIEWICZ, OF LAFAYETTE, COLORADO.

SAFETY DEVICE FOR ELEVATORS.

Application filed April 6, 1914.

To all whom it may concern:

Be it known that I, WILLIAM J ASKIEWICZ, a citizen of the United States,and residing at Lafayette, in the county of Boulder and State ofColorado, have invented certain new and useful Improvements in SafetyDevices for Elevators, of which the following is a specification. I

This invention relates to certain new and useful improvements in safetydevices for elevators.

The primary object of this device is to provide a means that is readilymounted upon an elevator and whereby the breaking of the hoisting cabletherefor automatically releases a stationary locking device for theelevator car, thereby instantly stopping the elevator and preventing anyinjury to the contents thereof which would otherwise result from thefalling of the car.

A further object of the device is to provide a simple and inexpensivemeans readily attached to an elevator car and shaft and adapted forcooperating to insure against the droppingof the car Within the shaftupon the accidental severance oi the car hoisting means. s

A still further object is to provide a rack means within the shaft andmeshing pinions therefor carried by revoluble shafts upon the car, andautomatic means carried by the latter for locking such pinion shaftsagainst rotation whenever the hoisting cable becomes slack or broken-With these general objects in view and others that will appear as thenature of the invention is better understood, the same consists in thenovel combination and arrangement of parts hereinafter fully described,illustrated in the accompanying drawings, and pointed out in theappended claims.

In the drawings forming a part of this application and in which likedesignating characters refer to corresponding parts throughout theseveral views :Figure 1 is a vertical longitudinal sectional View takenthrough an elevator shaft and a car positioned therein, illustrating theinvention installed thereon. Fig. 2 is a similar sectional view takenupon a plane at right angles to the line of section of Fig. 1. Fig. 3 isa detail perspective View of one of the locking levers and its guide rodas employed upon the car. Fig. 4 is a horizontal transverseSpecification of Letters Patent.

Patented Dec. 22, 1914.

Serial No. 829,879.

sectional view taken upon the line 14 of Fig. 1, looking in thedirection of the arrows, and, Fig. 5 is a similar sectional view takenupon line 55 of Fig. 1, looking in the direction of the arrows, parts ofthe same being broken away.

Referring more in detail to the drawings, the elevator shaft 10 isillustrated with the car 11 .l'ROllH L-Qd thereon and adapted forvertical movement, being propelled 'up- Wardly by means of the usualhoisting cable Racks 13 .16 provided oppositely position d I' thirth vshaft and extending from the i :p to thbe tom thereof, the said racksbeing provided with opposite side teeth 14.

Th car hot an 15 is provided on its under Lde Z'Ylil. parallel brackets16'having t e r-c ol e shafts 17 journaled therein is. 1.2a...transversely of the car, and provided upon its opposite ends with pini:ns 18 ha ring constant engagement with the .ee h 1 of the racks andmoving thereon durin the travel of the car in either direction andwhereby the shafts 17 are caused to revolve at all times while the caris L; angular levers 19 are pivotally .yzounted upon the pin 20 to thecar bottom and are provided with an expulsion spring Y1 positionedbetween their longer arms 22 'hile the free ends of said arms are turnedI81 forming a loop 23 for the reception of guide rod 24 carried by thecar bottom and whereby the pivotal movement of the arms is guided by thesaid rod.

A cord 25 is threaded through the connecting links 26 of the supportingcable 12 at the top of the car and has its opposite ends extendingdownwardly along the opposite sides of the car and running over rollers27 oppositely positioned adjacent the car bottom and opposite toprollers 27, hile the free ends of the cord are secured to theoppositely-projecting short arm 28 of the members 19. Such connection ofthe 10rd with said short arms 26 is such that with the usual weight uponthe supporting cable 12, the cord 25 will forcibly hold the arms 28apart and thereby retain the long arms 22 in their innermost positionsand consequently press the expulsion spring 21 therebetween.

With the cord 25 retaining the spring 21 compressed, the arm members 22are out of engagement with the star wheel 29 rigidly secured upon theshaft 17, and oppositely positioned, while upon a releasing of the cord25 as by a severing or slacking of the cable 12, the short ends 28 arereleased whereupon the tension of the spring 21 forces the long ends 22outwardly as guided by the rod 24 and into locking engagement with theopposite star wheels 29.

The complete operation of the device will be at once apparent from theabove detailed description, in that the arms 22 are normally held out ofengagement with the star wheels 29 by means of the cord 25 during theusual movements of the car in its travel, and at all of which times theshafts 17 and their star wheels are caused to revolve by means of theengagement of the pinions 18 upon the racks 14 and it will be evidentupon the breaking of the hoisting cable 12, the cord 25 will be relaxed,allowing the spring 21 to operate and engage the arms 22 with the starwheels 29, and effecting an immediate stopping of the car as well as alocking of the same in such posi tion. The car may then be released forfurther movement only upon forcing inwardly the arms 22 out ofengagement with the star wheels 29.

While the form of the invention herein shown and described is what isbelieved to be a preferable embodiment thereof, it is nevertheless to beunderstood that various forms and modifications may be had withoutdeparting from the spirit and scope of the invention as claimed.

WVhat is claimed as new is 1. A device of the class described,comprising in combination with an elevator shaft and a car movabletherein, of oppo sitely positioned double racks vertically mountedwithin the elevator shaft, journa'led shafts carried by said car,oppositely positioned pinions upon the ends of each of said shafts andadapted for traveling engagement with said racks, centrally positionedstar wheels secured to said shafts, angular locking levers pivoted tosaid car and each having long and short portions, expansion meansbetween the longer portions of said levers adapted for separating thesame and engaging them with said wheels, a cord engaging the hoistingcable of the elevator and connected to the outwardly projecting shorterarms of said le vers and adapted for inwardly positioning Copies of thispatent may be obtained for the long portions thereof with said resilientmeans under compression.

2. A device of the class described, comprising in combination with anelevator shaft, a car movable therein, of double racks mounted in saidshaft, opposite shafts journaled upon the bottom of said car, pinionsupon the opposite ends of said shafts in meshing engagement with saidracks, central star wheels oppositely positioned and secured to saidrevoluble shafts, angular lei'ers each having a long and a short arm, apivot post upon which both of said levers are mounted, an arcuate guiderod upon the bottom of the car, the long arms of said levers beingoverturned. forming loops for sliding engagement with said rod, anexpansion spring between said long arms, a cord engaging the elevatorhoisting cable and having its free ends secured to the short arms ofsaid levers and adapted for normally positioning inwardly the long armsthereof with said spring under compression therebetween.

3. A device of the class described, com prising in combination with anelevator shaft, a car movable therein, of double racks mounted in saidshaft, opposite shafts journaled upon the bottom of said car, pinionsupon the opposite ends of said shafts in meshing engagement with saidracks, central star wheels oppositely positioned and secured to saidrevoluble shafts, angular levers each having a long and a short arm, apivot post upon which both of said levers are mounted, an arcuate guiderod upon the bottom of the car, the long arms of said levers beingoverturned forming loops for sliding engagement with said rod, anexpansion spring between said long arms, a cord engaging the elevatorhoisting cable and having its free ends secured to the short arms ofsaid levers and adapted for normally positioning inwardly the long armsthereof with said spring under compression therebetween, the said leversadapted for automatic engagement with said star wheels upon severing ofsaid cable and thereby locking the car against movement.

In testimony whereof I affix my signature in presence of two witnesses.

\VILLIAM JASKIEVVICZ.

\Vi tnesses CHEEL VVILsoN, JosEr PoMioH'rnR.

five cents each, by addressing the Commissioner of Patents Washington,D. C.

